author(s)
Nishikant Yadav, Virendra Uchware and Prince Jain

abstract
The experiment was carried out to assess the bioefficacy of insecticides against Okra whitefly at experimental farm, College of Agriculture, Indore (M.P.) on Okra (Abelmascus esculentus). The six treatments consist of Four doses of carboxamide 300 SC @ 6.50, 12.50, 18.50 and 37 g.a.i. ha1, Chlorantraniliprole 18.5% SC @ 25 g.a.i. ha-1 and Cypermethrin 10% EC @ 70 g.a.i. ha-1 including untreated control were sprayed thrice at 10 days interval. The overall reduction in whitefly population after three applications of treatments over pre treatment population of first application to the last count of third spray was calculated. The result revealed that the maximum reduction in population was observed in treatment carboxamide 300 SC @ 37 g.a.i. ha-1 (93.45%) followed by chlorantraniliprole 18.5% SC @ 25 g.a.i. ha-1 (91.04%) and carboxamide 300 SC @ 18.5 g.a.i ha-1 (87.94%), The minimum percentage of reduction in whitefly population was recorded in the carboxamide 300 SC @ 6.50 g.a.i. ha-1 (75.82%). The marketable Okra fruit yield and cost benefit ratio was recorded higher in higher dose of carboxamide 300 SC @ 37 g.a.i. ha^-1 at par with Chlorantraniliprole 18.5% SC @ 25 g.a.i. ha-1 followed by carboxamide 300 SC @ 18.50 g.a.i. ha-1 as compared to untreated control.